Cylinder Head Porting and Power Production

rmchrgr said

Sorry if this is not a relevant question but beyond the obvious answer of "more air=more power", how does exhaust port flow affect overall power?

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In my opinion- not much. They pressure differential is so great the hole size and shape just had to be big enough to not impede the blown down, and then the header has to work to scavenge. The port itself doesn’t have a lot of impact, imo.